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National Instruments Corporation
9
BNC-2121 Connector Accessory for 660X Devices
Two-Signal Edge-Separation Measurement
To take a two-signal edge-separation measurement, complete the following
steps.
1.
Connect a wire from the
spring terminal to UP/DOWN of the
selected counter.
2.
In the C interface or in LabVIEW, select an internal timebase as
SOURCE of the selected counter. As soon as UP/DOWN goes active,
the counter counts the edges on SOURCE.
3.
Connect a wire from the
Trigger
spring terminal to GATE of the
selected counter.
4.
Press the
Digital Trigger
button to drive GATE into an active state.
As soon as GATE goes active, the counter value is latched for a
software read.
Note
UP/DOWN and AUX_LINE share the same PFI line on all counters.
Single Pulse Generation
To generate a single pulse, complete the following steps.
1.
In the C interface or in LabVIEW, select an internal timebase as
SOURCE of the selected counter.
2.
Specify the pulse delay and pulse width in the C interface or
LabVIEW.
3.
To see the signal, connect an oscilloscope or analog input device to
OUT of the selected counter.
Single-Triggered Pulse Generation
To generate a single-triggered pulse, complete the following steps.
1.
In the C interface or in LabVIEW, select an internal timebase as
SOURCE of the selected counter.
2.
Specify the pulse delay and pulse width in the C interface or
LabVIEW.
3.
Connect a wire from the
Trigger
spring terminal to GATE of the
selected counter.
4.
Press the
Digital Trigger
button to generate a single pulse. One pulse
is generated on OUT of the counter when the trigger is received.
5.
To see the signal, connect an oscilloscope or analog input device to
OUT of the selected counter.
